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Simplifying
243.36 = r2
Solving
243.36 = r2
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Add '-1r2' to each side of the equation.
243.36 + -1r2 = r2 + -1r2
Combine like terms: r2 + -1r2 = 0
243.36 + -1r2 = 0
Add '-243.36' to each side of the equation.
243.36 + -243.36 + -1r2 = 0 + -243.36
Combine like terms: 243.36 + -243.36 = 0.00
0.00 + -1r2 = 0 + -243.36
-1r2 = 0 + -243.36
Combine like terms: 0 + -243.36 = -243.36
-1r2 = -243.36
Divide each side by '-1'.
r2 = 243.36
Simplifying
r2 = 243.36
Take the square root of each side:
r = {-15.6, 15.6}
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